lib/Support/BinaryStreamError.cpp

   1 //===- BinaryStreamError.cpp - Error extensions for streams -----*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/Support/BinaryStreamError.h"
  11 #include "llvm/Support/ErrorHandling.h"
  12
  13 using namespace llvm;
  14
  15 char BinaryStreamError::ID = 0;
  16
  17 BinaryStreamError::BinaryStreamError(stream_error_code C)
  18     : BinaryStreamError(C, "") {}
  19
  20 BinaryStreamError::BinaryStreamError(StringRef Context)
  21     : BinaryStreamError(stream_error_code::unspecified, Context) {}
  22
  23 BinaryStreamError::BinaryStreamError(stream_error_code C, StringRef Context)
  24     : Code(C) {
  25   ErrMsg = "Stream Error: ";
  26   switch (C) {
  27   case stream_error_code::unspecified:
  28     ErrMsg += "An unspecified error has occurred.";
  29     break;
  30   case stream_error_code::stream_too_short:
  31     ErrMsg += "The stream is too short to perform the requested operation.";
  32     break;
  33   case stream_error_code::invalid_array_size:
  34     ErrMsg += "The buffer size is not a multiple of the array element size.";
  35     break;
  36   case stream_error_code::invalid_offset:
  37     ErrMsg += "The specified offset is invalid for the current stream.";
  38     break;
  39   case stream_error_code::filesystem_error:
  40     ErrMsg += "An I/O error occurred on the file system.";
  41     break;
  42   }
  43
  44   if (!Context.empty()) {
  45     ErrMsg += "  ";
  46     ErrMsg += Context;
  47   }
  48 }
  49
  50 void BinaryStreamError::log(raw_ostream &OS) const { OS << ErrMsg; }
  51
  52 StringRef BinaryStreamError::getErrorMessage() const { return ErrMsg; }
  53
  54 std::error_code BinaryStreamError::convertToErrorCode() const {
  55   return inconvertibleErrorCode();
  56 }